Wiper



Jan. 5 1'926.

J. A. SOMERVILLE WIPER FiledDeG, 18, 1924 Patented Jan. 5,' 1926.

UNITED STATES.

v JOSEPH A.. SOMERVILLE, OF ST. LOUIS, MISSOURI.

WIPER.

Application filed December 18, 1924. SeralrNo. 756,679.

To all 'zo/0m t 01mg/ concern.'

Be it known that I, JOSEPH A. SoMnr.- VILLE, a citizen ot' the UnitedStates, residing at the city of St. Louis, in the'Stat-e of Missouri,have invented certain new and useful Improvements in W'ipers, of whichthe following is a specification.`

This invention relates to wipers, and more particularly to power drivenwipers for the window panes of street cars 'and the like, whereby theouter side of the pane, which is ordinarily inconveniently accessiblefor cleaning from the inside of the car, may be readily cleanedv atdesired intervals by mere 1 momentary.pressure on a manually operatedswitch arranged within convenient reach of the motorman.

The advantages above set forth and others incident to the invention willbe best understood and appreciated from the following description of thepreferred form of this invention, selected from divers embodiments forthe purpose of illustration.

In the accompanying drawings forming part of this specification, inwhich like numbers of reference denote like they occur,

Figure 1 is a fragmentary elevation of the outside of a car vestibule,showing the wiper of this invention applied to the window thereof;

Figure 2 is a sectional view, taken on the line 2 2 in Figure 1;

parts wherever Figure 3 is a transverse sectional viewV through thewiper proper, taken on the line 3 3 in Figure 1;

Figure 4 is a detail sectional view of the operating switch, taken onthe line 4-4 in Figure 1; and

Figure 5 is a transverse sectional view through the solenoid and guidecasing therefor, taken on the line 5--5 in Figure 1.

A window sash 1, including window pane 2, is slidable, for the purposeof opening or closing the window, in the usual manner in the vestibuleframe 3. On the outer side 4 of the frame 3 are mounted at either sideof the window pane 2, the guides 5, formed of non-magnetic material, andpreferably extending from the roof to the floor of the car. The guides 5are preferably tubular in form, and preferably have integral therewithor aflixed thereto in any suitable manner the flanges 6, whereby thetubes 5 may be attached to the frame 3 by screws or other suitablefastening means T.

Solenoids 8 and 9 are secured in 'the upper ends of their respectivetubes` 5 preferably by screws 10, and solenoids 11 and 12 are likewisesecured in the lower ends of their respective tubes. Plungers 13 arecommon to the upper and lower solenoids of each guide 5, and haveaffixed thereto intermedirate their ends the collars or slides 14, whichlatter are preferably retained in position on the plungers 13 by thescrew studs 15, screwthreading laterally into the slides 14 and seatingagainst the the plungers 13. Tubes 5 are slotted at 16 between the upperand lower magnets to permit the passage of the studs 15, which extendfrom the ends of the wiper holder 17. lViper holder 17 preferablytubular in form, and slitted at 18 on the side thereof facing the pane2. The tube 17 is normally under an elastic strain which tends to closethe slit 18, and by reason thereof securely holds wiping strip 19 in thesaid slit. liping strip 19 may be of any suitable material, but rubberis deemed preferable. The ends of tube 17 embrace the studs 15, and aresecured thereto preferably by transverse bolts 20.

A switch 21, comprising button or plunger 22, casing 23, blade 24, andcontacts and 26 is inserted in the inner side of the frame 3 at a pointwithin convenient reach of the motorman, preferably adjacent the pane ata point intermediate the vertical dimension thereof. Wires 27 and 28 areconnected to the source of electric current, wire 27 leading toresilient blade 24, which normally impinges against stop or contact 25,from whence the current is conducted through wire 29 to solenoid 9, fromthence by wire 30 to solenoid 8, and from thence by wire 31 back to wire28. Contact 26, wire 32, solenoid 12, wire 33, solenoid 11, and wire 34constitute the alternative circuit through which the current passes whenplungers or button 22 is depressed.

With current supplied through wires 27 and 28, the wiper is normallyheld in the elevated position shown in Figure 1, the

plungers 13 being drawn up into their respective upper solenoids 8 and9. Should the vision of the motorman become obscured by the accumulationof moisture and other deposits on the outside of the pane 2, the windowmay be readily cleaned with a minimum of effort by merely pressing` thebutton 22. whereby blade 24 is depressed from its normal position andinto contact with stud 25, cle-energizing the uppersolenoids 8 and 9,and supplying the current to the lower pair ot solenoids 11 and 12instead, whereb'r plungers 13 are then attracted byl and descend intothe lower solenoids 11 and 12 carrying with them wiper 17. llVhen buttonis released, blade 24E springs back to its normal position, discharginglower solenoids 11 and 12 and recharging upper solenoids 8 and 9,causing wiper 17 to ascend to its normal elevated initial position.rlhus every time the switch is operated` wiper 17 completes one completedescending. stroke and one complete ascending stroke. The lower magnets11 and 12 may be designed with fewer ampere-turns than the upper magnets8 and 9, since the weight ofthe wiper andV associated` plungers isfavorable to the descent ofthe wiper.

I claim:

1. In a window'wiper, a pair ot laterally spaced' guide tubesrespectively slotted ,ter a portion ot their lengthto provide guideopenings, al plunger within each guide tube adapted to slide from oneend to the other thereof, a slidable collar on each plunger,

pair of studs, each of said studs having a screw-threaded shank engagedin a screwthreaded` opening in a collar and seating;I against theplunger for locking the said collar thereon, a wiping strip, a holdertherefor having its opposite ends embracing the said studs, andremovable transverse bolts securing the said ends ot the holder to thesaid studs.

2. ln a window wiper, a pair of spaced guides, slides constrained tomove within the said guides, a wiping strip, a spring-nietal tubeslotted on one side to accommodate the said wiping strip and normallyunder an elastic strain to close the slotted side upon the strip, aconnecting stud between each slide and the adj aceut end o the tube,each of the said studs having one of its ends in screw-threadedengagement with the slide and the other end embraced b v the tube, and

means for releasablxT locking the said e1nbraced ends of the said studsto the said tube.

In testimony whereoic l hereunto aliir: my signature.

JOSEPH A. SOMEBVILLE.

